Refactor router_dump_exit_policy_to_string

Split out policy_dump_to_string to use it in getinfo_helper_policies.

3 files changed, 53 insertions, 34 deletions

diff --git a/src/or/policies.c b/src/or/policies.c
index 91ca867783..0e7b3bda2e 100644
--- a/src/or/policies.c
+++ b/src/or/policies.c
@@ -2027,6 +2027,53 @@ compare_tor_addr_to_node_policy(const tor_addr_t *addr, uint16_t port,
   }
 }
 
+/**
+ * Given <b>policy_list</b>, a list of addr_policy_t, produce a string
+ * representation of the list.
+ * If <b>include_ipv4</b> is true, include IPv4 entries.
+ * If <b>include_ipv6</b> is true, include IPv6 entries.
+ */
+char *
+policy_dump_to_string(const smartlist_t *policy_list,
+                      int include_ipv4,
+                      int include_ipv6)
+{
+  smartlist_t *policy_string_list;
+  char *policy_string = NULL;
+
+  policy_string_list = smartlist_new();
+
+  SMARTLIST_FOREACH_BEGIN(policy_list, addr_policy_t *, tmpe) {
+    char *pbuf;
+    int bytes_written_to_pbuf;
+    if ((tor_addr_family(&tmpe->addr) == AF_INET6) && (!include_ipv6)) {
+      continue; /* Don't include IPv6 parts of address policy */
+    }
+    if ((tor_addr_family(&tmpe->addr) == AF_INET) && (!include_ipv4)) {
+      continue; /* Don't include IPv4 parts of address policy */
+    }
+
+    pbuf = tor_malloc(POLICY_BUF_LEN);
+    bytes_written_to_pbuf = policy_write_item(pbuf,POLICY_BUF_LEN, tmpe, 1);
+
+    if (bytes_written_to_pbuf < 0) {
+      log_warn(LD_BUG, "policy_dump_to_string ran out of room!");
+      tor_free(pbuf);
+      goto done;
+    }
+
+    smartlist_add(policy_string_list,pbuf);
+  } SMARTLIST_FOREACH_END(tmpe);
+
+  policy_string = smartlist_join_strings(policy_string_list, "\n", 0, NULL);
+
+done:
+  SMARTLIST_FOREACH(policy_string_list, char *, str, tor_free(str));
+  smartlist_free(policy_string_list);
+
+  return policy_string;
+}
+
 /** Implementation for GETINFO control command: knows the answer for questions
  * about "exit-policy/..." */
 int
diff --git a/src/or/policies.h b/src/or/policies.h
index 26f92ad077..d7cc5a30ba 100644
--- a/src/or/policies.h
+++ b/src/or/policies.h
@@ -76,6 +76,9 @@ void addr_policy_append_reject_addr_list(smartlist_t **dest,
 void policies_set_node_exitpolicy_to_reject_all(node_t *exitrouter);
 int exit_policy_is_general_exit(smartlist_t *policy);
 int policy_is_reject_star(const smartlist_t *policy, sa_family_t family);
+char * policy_dump_to_string(const smartlist_t *policy_list,
+                             int include_ipv4,
+                             int include_ipv6);
 int getinfo_helper_policies(control_connection_t *conn,
                             const char *question, char **answer,
                             const char **errmsg);
diff --git a/src/or/router.c b/src/or/router.c
index 95e5ad8c30..90203458b2 100644
--- a/src/or/router.c
+++ b/src/or/router.c
@@ -2728,44 +2728,13 @@ router_dump_exit_policy_to_string(const routerinfo_t *router,
                                   int include_ipv4,
                                   int include_ipv6)
 {
-  smartlist_t *exit_policy_strings;
-  char *policy_string = NULL;
-
   if ((!router->exit_policy) || (router->policy_is_reject_star)) {
     return tor_strdup("reject *:*");
   }
 
-  exit_policy_strings = smartlist_new();
-
-  SMARTLIST_FOREACH_BEGIN(router->exit_policy, addr_policy_t *, tmpe) {
-    char *pbuf;
-    int bytes_written_to_pbuf;
-    if ((tor_addr_family(&tmpe->addr) == AF_INET6) && (!include_ipv6)) {
-      continue; /* Don't include IPv6 parts of address policy */
-    }
-    if ((tor_addr_family(&tmpe->addr) == AF_INET) && (!include_ipv4)) {
-      continue; /* Don't include IPv4 parts of address policy */
-    }
-
-    pbuf = tor_malloc(POLICY_BUF_LEN);
-    bytes_written_to_pbuf = policy_write_item(pbuf,POLICY_BUF_LEN, tmpe, 1);
-
-    if (bytes_written_to_pbuf < 0) {
-      log_warn(LD_BUG, "router_dump_exit_policy_to_string ran out of room!");
-      tor_free(pbuf);
-      goto done;
-    }
-
-    smartlist_add(exit_policy_strings,pbuf);
-  } SMARTLIST_FOREACH_END(tmpe);
-
-  policy_string = smartlist_join_strings(exit_policy_strings, "\n", 0, NULL);
-
- done:
-  SMARTLIST_FOREACH(exit_policy_strings, char *, str, tor_free(str));
-  smartlist_free(exit_policy_strings);
-
-  return policy_string;
+  return policy_dump_to_string(router->exit_policy,
+                               include_ipv4,
+                               include_ipv6);
 }
 
 /** Copy the primary (IPv4) OR port (IP address and TCP port) for